Eyeglass construction.



provide simple,

' the bridge or nose-piece,

.there is provided each lug 3 a recess 4 having side walls wh ch: arepreferably undercut as indicated at 5.' These recesses may be of anydesired con- I tour,such as that indicated by the dotted g 'TED%TATE%EAT w s'rnrnnn J. CLULEE, or ATTLEBORO, massacirusnr rs.

EYEGLASS consrnucrlons To all-whom it may concern/:-

a citizen of the United States, and residing at Attleboro, in the countyof Bristol and State of Massachusetts, have invented a new and ImprovedEyeglass Construction, of which the following specificationw is a'fulldisclosure.

This invention relates to eyeglass construction.v One of the objectsthereof is to practical and reliable means for securing a supportingmember to an eyeglass lens. Another object is to provide means of theabove type which may be used quickly and conveniently and at a-low cost.Another object is to provide an art ofsecuring together an eyeglass lensand a supporting member.

. Other objects will be in part obvious and in part pointed outhereinafter.

The invention accordingly consists in the features of construction,combinations. of

elements, arrangement .of parts, and in the several steps and relationand order of such steps which will be set forth in'the followingdescription, and the scope of the application of which will be indicatedin the appended claims.

In the accompanying drawing, in which is shown one of various possibleembodiments of the mechanical features of this invention, Figure 1 is aside elevation of a lens with -a supporting member or clamp mountedthereon. Fig, 2 is a cross-section taken along the line 'AA of Fig. 1.

Similar reference characters refer to similar parts throughout bothviews of the draw- Referring now to Fig. 1 of the drawing, there isindicated at 1 an eyeglass lens, and it may here be noted that the termeyeglass is used throughout to comprehend spectacles and like devices,as well as glasses mounted upon the nose. Secured to lens 1 is a lensclamp comprising a strap portion 2 and side wings or lugs 3. This lensclamp may be secured in any desired manner to not being shown as theyform in themselves no part of the present invention. 7

As best shown in Fig. 2 of the draw ng, in the inner surface ofSpecification of Letters Patent.

Application filed May 3, 1

the securing means Patented May 1, 19117.

915. Serial No. 25,479.

line6 in Fig. 1 of the, drawings. Formed in the base or strap portion 2is a recess 7 also undercut, and preferably extending for a substantialdistance circumferentiall of the lens, as indicated at 8 in Fig. l o thedrawing.

Recesses 4 and 7 are filled with a vitreous I as enamel, which isprefersubstance, such ably fused to the contacting surfaces of the lensclamp, the latterterm being broadly used to cover any device of thisgeneral nature secured to an edge of the lens. There is thus providedthroughout a considerable proportion of the interior of the lens clamp anon-metallic and preferably glazed surface which adheres to the metal ofthe lens clamp with the greatest tenacity. In so far as the broaderfeatures of this invention are concerned, this enameling may be applieddirectly to the inner surface of the lens clamp without forming therecesses 1 and 7 butthere are many advantages in the arrangement shown.

The lens clamp thus formed is fitted about the edge portion of the lens1 at the. proper point and securely cemented thereto by a suitableadhesive which may, if desired, be

fusible at a low temperature to permit removal of a broken lens.

It being understood that prior to mount,

ing the lens clamp in position the vitreous enamel is fused, as bybaking, to the surface of the metal, and inasmuch, further, as a glassysubstance of this nature may be cemented to the glass of the lens withfar greater,tenacity than it isvpracticable to cement metal to glass, itwill be seen that an extremely strong connection may be made.Furthermore, by the use of the several recesses, as shown, thereis'provided a three-point connection which is rigid and durable to ahigh degree. Also, a cement is here employed which is specificallyadapted and lntended to adhere to a glassy surface without having to somodify it and impair it as to adapt it for adhesion to a metallicsurface, as when metal is cemented directly to glass. Furthermore, theeffect of the expansion and contraction of the metal with varyingtemperature does not here tend to loosen the attachment of the lensclamp with {the lens.

The method of use of the above device has been described in substance,but it, may be noted that when the lens is to be secured to the clamp,there is preferably applied to heated, and, the lens is then properlyposi-- the interior of the clamp a thin film of readily fusible cement,the clamp being tioned between the side wings of the clamp. When theparts cool, there is thus provided a joint'in which the fused insertsnot only interlock with, but form substantially a part of, the clamp andtheseas well as the metallic surface of the clamp are cemented in placeto the engaging surface of the lens with a cement which will securelyhold them in position. i

It will thus be seen that there is provided a device and an art in whichthe objects of thisinvention are achieved and which are v well suitedtowithstand conditions of the hardest practical use. I As variouschanges might be made in the above construction, and as the abovedescribed art might be carried on in a some 1 what different manner, itis intended that all matters shownin the accompanying drawing or setforth in the foregoing de-' scription shall be interpreted asillustrative tion, a lens clamp having a vitreous material fused againstits inner surface in'position to engage the lens.

3. In eyeglass construction, in combination, a lens, a lens clamp havinga refractory non-"metallic material fused against its in ner surface,and means cementing said nonmetallic surfaceto said lens.

4. In eyeglass construction, in combination, a lens, a lens clamp havinga refractory non-metallic material fused against its vinner surface, andmeans cementing said non-metallic surface to said lens, said nonmetallicmaterial being positioned on the weasel inner surface of each side lugand'of the I strap portion of-the clamp.

5..In eyeglass construction, in combina tion, a lens, a lens clamphaving a plurality of recesses in its inner surface, a'vitreous materialsecured within each of said recesses to form'inserts therein, thesurfaces of said inserts being adapted to. fit smoothly and closely theouter surface of an edge portion of said lens, and means cementing saidvitreous material to the engaglng surfaces of said lens.

6. In eyeglass construction, in combination, a lens, a'lens clamp havinga plurality of recesses in'its inner surface, a vitreous materialsecured within eachof said recesses to form inserts therein, thesurfaces of said inserts beingadapted to fit' smoothly and closely theouter surface of an edge portion of'said lens, and means cementing saidvitreous materlal to the engaging surfaces of said lens, said vitreousmaterial being fused to'the surfacesof-the metallic lens clamp which itengages.

7. The art which comprises fusing a vitreous material against the innersurface of a metallic lens clamp, inserting a lens within said clampwith cement fusible at low temperature between thesurface of the lensand the surface of said vitreous material,

said cement being heated to atemperature above its fusing point and.below' the fusing point of saidvitreous material, and permitting saidcement to cool.

8. The art which comprises applying enamel fusible at high temperatureto the inner surface of a lens clamp and fusing it against the same toform smooth exposed surfaces, interposing a cement fusible at low Ytemperature between said enamel and the surface of a lens fitted in saidclamp, heating said cement to a relatively low temperature to fuse it,and permitting the parts to cool.

In witness whereof, I hereunto subscribe my name, as attested by the twosubscribing witnesses.

STEPHEN J. CLULEE. Witnesses:

WALTER A. BRIGGS, PETER NERNEY.

